The feedback control of stochastic resonance in bistable system

A feedback method is proposed to control the stochastic resonance by feeding back the output of bistable system to the input to re-act on the system. In a typical bistable system， the signal-to-noise ratio and spectral power amplification are considered as observable variables to evaluate the stochastic resonance effect. The stochastic resonance phenomenon caused by the linear or nonlinear feedback functions are studied respectively. The theoretical analysis and numerical simulation show that the stochastic resonance is controllable， and this method is especially suitable to the system of which the parameters are fixed or difficult to vary.